Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure.

Lee MY, Tan CK, Downey KM, So AG
Biochemistry (1984), Volume 23, Page 1906
PubMed entry

Abstract:

DNA polymerase delta from calf thymus has been purified to apparent ...
DNA polymerase delta from calf thymus has been purified to apparent homogeneity by a new procedure which utilizes hydrophobic interaction chromatography with phenyl-Sepharose at an early step to separate most of the calcium-dependent protease activity from DNA polymerase delta and alpha. The purified enzyme migrates as a single protein band on polyacrylamide gel electrophoresis under nondenaturing conditions. The sedimentation coefficient of the enzyme is 7.9 S, and the Stokes radius is 53 A. A molecular weight of 173K has been calculated for the native enzyme. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the homogeneous enzyme reveals two polypeptides of 125 and 48 kDa. This subunit structure differs from that of DNA polymerase delta prepared by our previous procedure, which was composed of subunits of 60 and 49 kDa [Lee, M. Y. W. T., Tan, C.-K., Downey , K. M., & So, A. G. (1981) Prog . Nucleic Acid Res. Mol. Biol. 26, 83-96], suggesting that the 60-kDa polypeptide may have been derived from the 125-kDa polypeptide during enzyme purification, possibly as the result of cleavage of an unusually sensitive peptide bond. DNA polymerase delta is separated from DNA polymerase alpha by hydrophobic interaction chromatography on phenyl-Sepharose; DNA polymerase delta is eluted at pH 7.2 and DNA polymerase alpha at pH 8.5. DNA polymerase delta can also be separated from DNA polymerase alpha by chromatography on hydroxylapatite; DNA polymerase alpha binds to hydroxylapatite in the presence of 0.5 M KCl, whereas DNA polymerase delta is eluted at 90 mM KCl.(ABSTRACT TRUNCATED AT 250 WORDS)

Polymerases:

Topics:

Historical Protein Properties (MW, pI, ...), Exonuclease Activity, Source / Purification

Status:

new topics/pols set partial results complete validated

Results:

Polymerase Reference Property Result Context
Bovine pol elta Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure. Molecular Weight 173kD Technique: Gel Filtration
Bovine pol elta Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure. 3-5' Exonuclease (proofreading) Yes
Bovine pol elta Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure. Cloned or native Native organism
Bovine pol elta Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure. Full length or truncated Full length
Bovine pol elta Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure. Specific Activity 4.79E+04 units/mg
Bovine pol elta Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure. Isoelectric Point pH 5.5

Entry validated by:

Using Polbase tables:

Sorting:

Tables may be sorted by clicking on any of the column titles. A second click reverses the sort order. <Ctrl> + click on the column titles to sort by more than one column (e.g. family then name).

Filtering:

It is also possible to filter the table by typing into the search box above the table. This will instantly hide lines from the table that do not contain your search text.